docs: def get_is_value(tag):
      """
      Getters for data that also work with implicit transfersyntax
  
      :param tag: the tag to read
      """
      # data is int formatted as string so convert te string first and cast to int
      if tag.VR == 'OB' or tag.VR == 'UN':
          value = int(tag.value.decode("ascii").replace(" ", ""))
          return value
      return int(tag.value)